Compared to the seawater around them, most marine invertebrates are

Which feature of osmoregulation is found in both marine and freshwater bony fish?

Unlike most bony fishes, sharks maintain body fluids that are isoosmotic to sea water. They are therefore considered by many to be osmoconformers because of the unusual way they maintain homeostasis. They osmoregulate by

tolerating high urea concentrations that balance internal salt concentrations to sea water osmolarity.

Which structure descends deep into the renal medulla only in juxtamedullary nephrons?

Which of the following processes of osmoregulation by the kidney is the least selective?

Proper functioning of the human kidney requires considerable active transport of sodium in the kidney tubules. If these active transport mechanisms were to stop completely, how would urine production be affected?

Which structure increases the reabsorption of Na+ when stimulated by aldosterone?

What would account for increased urine production as a result of drinking alcoholic beverages?

In a laboratory experiment with three groups, one group of people drinks pure water, a second group drinks an equal amount of beer, and a third group drinks an equal amount of concentrated salt solution all during the same time period. Their urine production is monitored for several hours. At the end of the measurement period, which group will have produced the greatest volume of urine and which group the least?